JP2015131097A5

JP2015131097A5 -

Info

Publication number: JP2015131097A5
Application number: JP2014242206A
Authority: JP
Filing date: 2014-11-28
Publication date: 2018-01-18
Anticipated expiration: 2034-11-28

Description

実施形態に係る超音波診断装置は、送信部と、受信部と、画像生成部と、表示制御部とを備える。送信部は、音響放射力に基づいて生体組織に変位を発生させる変位発生用超音波を超音波プローブから送信させ、前記変位発生用超音波に基づいて発生したせん断波による所定の走査領域内の生体組織の変位を観測する観測用超音波を前記超音波プローブから送信させる。受信部は、前記超音波プローブで受信された反射波に基づいて、反射波データを生成する。画像生成部は、前記反射波データに基づいて、前記走査領域内の複数位置それぞれにおける変位を複数の時相で算出し、算出した変位の解析により前記せん断波が到達した時相を前記複数位置それぞれで決定し、前記複数位置のうち決定された時相が略同一の位置同士を表す画像データを生成する。表示制御部は、前記画像データに基づく画像を、前記走査領域を含む領域に対応する医用画像に重畳表示させる。 The ultrasonic diagnostic apparatus according to the embodiment includes a transmission unit, a reception unit, an image generation unit, and a display control unit. The transmitting unit transmits a displacement-generating ultrasonic wave that generates a displacement in the living tissue based on the acoustic radiation force from an ultrasonic probe, and within a predetermined scanning region by a shear wave generated based on the displacement-generating ultrasonic wave . Observation ultrasonic waves for observing the displacement of the living tissue are transmitted from the ultrasonic probe. The receiving unit generates reflected wave data based on the reflected wave received by the ultrasonic probe. The image generation unit calculates a displacement at each of a plurality of positions in the scanning region in a plurality of time phases based on the reflected wave data, and calculates a time phase at which the shear wave has arrived by analysis of the calculated displacement. Each of the plurality of positions is determined, and image data representing positions having substantially the same time phase determined among the plurality of positions is generated. The display control unit superimposes and displays an image based on the image data on a medical image corresponding to an area including the scanning area.

Claims

Displacement of the living tissue in a predetermined scanning region caused by a shear wave generated based on the ultrasonic wave for displacement generation is transmitted from the ultrasonic probe to generate a displacement in the living tissue based on the acoustic radiation force. A transmitter for transmitting observation ultrasonic waves from the ultrasonic probe;
A receiving unit that generates reflected wave data based on the reflected wave received by the ultrasonic probe;
Based on the reflected wave data, the displacement at each of a plurality of positions in the scanning region is calculated at a plurality of time phases, and the time phase at which the shear wave arrives is determined at each of the plurality of positions by analysis of the calculated displacement , An image generating unit that generates image data representing positions having substantially the same time phase determined among the plurality of positions;
A display control unit that superimposes and displays an image based on the image data on a medical image corresponding to an area including the scanning area;
An ultrasonic diagnostic apparatus comprising:

The ultrasonic diagnostic apparatus according to claim 1, wherein the image generation unit determines a time phase at which the shear wave has reached based on a cross-correlation of displacements calculated for two different positions.

The ultrasonic diagnostic apparatus according to claim 1, wherein the image generation unit determines a time phase at which the calculated displacement is substantially maximum.

The ultrasonic diagnostic apparatus according to claim 1, wherein the image generation unit generates the image data corresponding to a plurality of discrete time phases.

For each position included in the image data, at least one of a dispersion value of the determined time phase at each position in a predetermined region including the position and a value based on the dispersion value and the magnitude of the displacement A calculation unit for calculating
The ultrasound according to any one of claims 1 to 4, wherein the image generation unit further assigns a pixel value corresponding to the variance value or the value of the position to each position included in the image data. Diagnostic device.

The image generation unit further includes, at each position included in the image data, either an index value of the hardness of the biological tissue based on a shear wave at the position or the magnitude of the displacement at the position. The ultrasonic diagnostic apparatus according to claim 1, wherein a corresponding pixel value is assigned.

The image generation unit generates a plurality of the image data for each of a plurality of different determined time phases, and assigns a pixel value corresponding to the determined time phase for each of the image data. Ultrasound diagnostic equipment.

Wherein the display control unit, when the image data for each phase when a plurality of the determined different each has a plurality of generated, the order time phases the determined earlier, and displays the image data, respectively, according to claim 7 An ultrasonic diagnostic apparatus according to 1.

The image generation unit further generates second image data representing positions where the index values of the hardness of the living tissue based on shear waves at each position in the scanning region are substantially the same,
The ultrasonic diagnostic apparatus according to claim 1, wherein the display control unit further displays an image based on the second image data on the medical image.

The image generation unit further generates third image data representing positions where the magnitudes of the displacements of the respective positions in the scanning region are substantially the same,
The ultrasonic diagnostic apparatus according to claim 1, wherein the display control unit further displays an image based on the third image data on the medical image.

The image generation unit further calculates the arrival time at which the shear wave reaches each position in the scanning region at the propagation speed of the shear wave in a predetermined region, and represents the positions where the calculated arrival times are substantially the same. Generate fourth image data,
The ultrasonic diagnostic apparatus according to claim 1, wherein the display control unit further displays an image based on the fourth image data on the medical image.

5th image data which assigned the pixel value according to the signal strength in B mode with respect to each position in the said scanning area | region, The index value of the hardness of the biological tissue based on a shear wave with respect to each position in the said scanning area | region 6th image data to which a pixel value corresponding to the image data is assigned, 7th image data to which a pixel value corresponding to the determined time phase at the position is assigned to each position in the scanning region, According to the eighth image data in which a pixel value corresponding to the magnitude of the displacement at the position is assigned to each position, and the determined temporal dispersion value for each position in the scanning region Ninth image data to which a pixel value is assigned, and tenth image data to which a pixel value corresponding to a value based on the determined temporal phase variance value and the magnitude of displacement is assigned to each position in the scanning region. At least One of the images based on the image data, further comprising a second image generator for generating as the medical image, the ultrasonic diagnostic apparatus according to claim 1.

The second image generation unit calculates the pixel value at each position included in the medical image, the index value at each position in the scanning region, the determined time phase, the magnitude of the displacement, the variance value, The ultrasonic diagnostic apparatus according to claim 11 , wherein the ultrasonic diagnostic apparatus is changed using any one of the parameters of the value.

The display control unit includes at least two pieces of image data among the fifth image data, the sixth image data, the seventh image data, the eighth image data, the ninth image data, and the tenth image data. causes parallel displaying an image based on, among the image data obtained by parallel display, at least the image on which is based on one of the image data, is superimposed displays an image based on the image data generated by the image generation unit, according to claim 12 An ultrasonic diagnostic apparatus according to 1.

In the parallel display, the display control unit is any one of the determined time phase of each position included in the sixth image data, the magnitude of the displacement, the variance value, and each parameter of the value. When one parameter does not satisfy a predetermined condition, the image at the position is not displayed, and the image corresponding to the position among the image data generated by the image generation unit that is the target of the parallel display. The ultrasonic diagnostic apparatus according to claim 14 , wherein h is not displayed.

The display control unit is an index value of the hardness of the biological tissue based on shear waves at each position in the region of interest, the determined time phase, the magnitude of the displacement, the variance value of the determined time phase, and The ultrasonic diagnostic apparatus according to claim 1, wherein at least one parameter is evaluated among values based on the variance value and the magnitude of the displacement, and an evaluation result is displayed.

Based on the reflected wave data, the displacement at each of a plurality of positions in the scanning region is calculated at a plurality of time phases, and the time phase at which the shear wave arrives is determined at each of the plurality of positions by analyzing the calculated displacement, An image generation unit that generates image data representing positions having substantially the same time phase determined among the positions;
An image processing apparatus comprising: a display control unit configured to superimpose and display an image based on the image data on a medical image corresponding to an area including the scanning area.

Based on the reflected wave data, the displacement at each of a plurality of positions in the scanning region is calculated at a plurality of time phases, and the time phase at which the shear wave arrives is determined at each of the plurality of positions by analyzing the calculated displacement, Generate image data representing positions that have substantially the same time phase determined among the positions,
An image processing method comprising: superimposing and displaying an image based on the image data on a medical image corresponding to an area including the scanning area.

Displacement of the living tissue in a predetermined scanning region caused by a shear wave generated based on the ultrasonic wave for displacement generation is transmitted from the ultrasonic probe to generate a displacement in the living tissue based on the acoustic radiation force. A transmitter for transmitting observation ultrasonic waves from the ultrasonic probe;
A receiving unit that generates reflected wave data based on the reflected wave received by the ultrasonic probe;
An image generation unit for generating image data representing positions where the index values of the hardness of the living tissue based on shear waves at each position in the scanning region are substantially the same;
An ultrasonic diagnostic apparatus comprising: a display control unit configured to superimpose and display an image based on the image data on a medical image corresponding to a region including the scanning region.

Displacement of the living tissue in a predetermined scanning region caused by a shear wave generated based on the ultrasonic wave for displacement generation is transmitted from the ultrasonic probe to generate a displacement in the living tissue based on the acoustic radiation force. A transmitter for transmitting observation ultrasonic waves from the ultrasonic probe;
A receiving unit that generates reflected wave data based on the reflected wave received by the ultrasonic probe;
An image generation unit that generates image data representing positions having substantially the same magnitude of displacement at each position in the scanning region;
An ultrasonic diagnostic apparatus comprising: a display control unit configured to superimpose and display an image based on the image data on a medical image corresponding to a region including the scanning region.

Displacement of the living tissue in a predetermined scanning region caused by a shear wave generated based on the ultrasonic wave for displacement generation is transmitted from the ultrasonic probe to generate a displacement in the living tissue based on the acoustic radiation force. A transmitter for transmitting observation ultrasonic waves from the ultrasonic probe;
A receiving unit that generates reflected wave data based on the reflected wave received by the ultrasonic probe;
An image generation unit that calculates the arrival time at which the shear wave reaches each position in the scanning region at the propagation speed of the shear wave in a predetermined region, and generates image data representing the positions where the calculated arrival times are substantially the same. When,
An ultrasonic diagnostic apparatus comprising: a display control unit configured to superimpose and display an image based on the image data on a medical image corresponding to a region including the scanning region.

Displacement of the living tissue in a predetermined scanning region caused by a shear wave generated based on the ultrasonic wave for displacement generation is transmitted from the ultrasonic probe to generate a displacement in the living tissue based on the acoustic radiation force. A transmitter for transmitting observation ultrasonic waves from the ultrasonic probe;
An ultrasonic diagnostic apparatus, comprising: an image generation unit configured to generate image data in which a pixel value corresponding to the magnitude of the displacement at each position is assigned to each position in the scanning region.

Displacement of the living tissue in a predetermined scanning region caused by a shear wave generated based on the ultrasonic wave for displacement generation is transmitted from the ultrasonic probe to generate a displacement in the living tissue based on the acoustic radiation force. A transmitter for transmitting observation ultrasonic waves from the ultrasonic probe;
An ultrasonic diagnostic apparatus, comprising: an image generation unit configured to generate image data in which pixel values corresponding to a dispersion value of arrival time are assigned to each position in the scanning region.

Displacement of the living tissue in a predetermined scanning region caused by a shear wave generated based on the ultrasonic wave for displacement generation is transmitted from the ultrasonic probe to generate a displacement in the living tissue based on the acoustic radiation force. A transmitter for transmitting observation ultrasonic waves from the ultrasonic probe;
A receiving unit that generates reflected wave data based on the reflected wave received by the ultrasonic probe;
Based on the reflected wave data, ultrasonic image data is generated, and the pixel value at each position included in the ultrasonic image data is used as an index of the hardness of the living tissue based on the shear wave at each position in the scanning region. And an image generation unit that changes using one of the parameters of the value, the arrival time, the magnitude of the displacement, and the dispersion value of the arrival time. .